Rotary engine or compressor



W A. BARY ROTARY ENGINE 0R COMPRESSOR July 19, 1949.

' 5 Sheets-Sheet 2 Filed July 26, 1945 'INVENTOR .ATTORNEY v July 19,1949. w. A. BARY 2,476,397

ROTARY ENGINE 0R COMPRESSOR Filed July 26, 1945 3 SheetsSheet 3 'F l G.4.- az

s i]? I J as VfiLdEMA/MLBARY INVENTOR Q4 wi h ATTORNEY Q Patented '19 QC Woldemar A. Bary,

New York, N. Y., assignor of fifty per cent to Leon Alexander Samoilofl,

Brooklyn, N. Y.

Application July 26, 1945, Serial No..6ll7,17 7

15 Claims.

tary expansion engines, to rotary compressors,

and to the combinations of rotary continuous combustion gasexpansionengines with rotary compressors and a combuster, as a primmoving assembly. 7

Many attempts have been made in the past to construct rotary combustionengines of a positive displacement. A rotary elastic fluid engine hasdistinct advantages over gas turbines, particulary in that theefllciency of a gas rotary engine remains high over a wide range ofspeeds so that the engine can be built for an desired speed without thenecessity of introducing expensive and heavy power consuming gears orelectric drive, such as are usually necessary with turbines. For thesame reason the rotary compressor of a positive displacement type has anadvantage that it can be operated at any desired speed with highefliciency.

The compressor and the turbine, as used today, are both of multistageaxial-flow, high speed, steam turbine type. At each stage, pressureenergy of the gases is converted into velocity at. the stationarynozzles and, in turn, velocity is converted into mechanical energy atthe moving blades. As the word multistage implies, the process isrepeated many times as the gases pass from one stage to the next. Thepresent-day gas turbine is a single speed and a high speed,.usuallygeared, machine.

My complete rotary continuous combustionengine assembly also has acompressor and a rotary engine on one shaft, a combuster between thetwo, and a starter, but my variable speed compressor is a single stagecompressor of higher efficiency, and my engine is a single stageexpansion engine, thereby eliminating the complexity of. construction,of multistaging, and all the losses resulting therefrom. (PresentWestinghouse gas turbine set, for instance, has for 40 lbs. pressure, acompressor with 21 stages and a turbine with 6 stages.) Having nonozzles and no change of gas velocity from stage to stage, mycompressor, as well as my rotary engine, can operate at various andvariable speeds over large ranges, similar to a conventionalreciprocating gasoline engine.

The compressor and the engine when used in mv power assembly, are almostidentical in printhe machines to such an extent that his 2 ciple of.operation, design and construction, but differing in size, eachconsisting of a cylindrical rotor with an even number of sliding vanes,un der positive control, revolving in'a noncylindrical stationary shell,with a multiple odd number of compression or expansion chambers workinin parallel.

My rotary machine is adapted to operate as an ordinary rotarycompressor, as a vacuum pump, as a pump for almost any liquid, as arotary steam expansion engine or as a rotary continuous combustion gasengine. Its efilciency is extremely high on account of the followingfeatures: Elimination of major portion of friction between the bladesand the shell, due to centrifugal force, by balancing the entire bladesystem of the rotor under a positive control, making it possible tooperate at high speeds; and substantial elimination of leakage by theintroduction of a positive centrifugal packing at all joints. I alsoprovide a thermal protection of bearings and of the vane controlmechanism for high temperature operation engine unit, and balancedthermal expansion of housing thereby eliminating axial bending of thesame.

The inability in the past to solve the problems involved in bringingabout these improvements has been the main reason why rotary machines ofthis type have not been in wider use. My improvements have increased theefliciency of possible to use such a compressor and such a gas rotaryengine in combination with a combuster to form an operating variablespeed high efficiency rotary'con'tinuous combustion gas engine sethaving a very wide and diversified field of application, with capacitiescovering a range from a few to several thousand H. P.

Up to now it has been found very diiiicult to construct a gas rotaryengine, a rotary compressor or a rotary pump for reasonably high speedsbecause sliding vanes, usually provided in such apparatus, beingsubjected to the action of the centrifugal force, progressively increasetheir pressure on the peripheral walls of the casing in which the vanesmove, thereby lowering prohibitively the efficiency of such machines.Moreover, such an increased friction results in an abnormally rapid wearof the rubbing surfaces so that these surfaces become rough, stillfurther in- I creasing the friction, and developing considerable leakagepast the blades, until the machine becomes unsuitable for normaloperation completely.

My invention has for its object to provide a emciency.

means to 3 rotary gas engine, liquid pump, vacuum pump. steam engineorrotary compressor with radially sliding vanes, in which the vanes areso mechanically interconnected and positively driven that the effect ofthe centrifugal force is largely eliminated and desired speed withoutundue wear and loss of Another object of my invention is to providemeans for sealing the sliding vanes. whereby any leakage-past the vanesis eliminated at all Joints over a wide range of speeds.

Another object of my invention is to provide means for protecting mainshaft bearings and vane control mechanism from the action of the hotgases in the operating chamber or chambers of the machine.

Another object of my invention is to provide means for balancing theoperating pressures at different peripheral points of the machine.

Another object of my invention is to provide prevent deformation of thehousing due to the uneven temperature at different points.

'Another object of my invention is to provide means for balancing therotating parts so as to eliminate vibrations.

These and other objects. features and advantages of my invention aremore fully explained in the accompanying BDeciflcation and drawings inwhich- Fig. 1 is a sectional elevational view of my rotary combustionengine,

Fig. 2 is a sectional the line 2-2 in Fig. compressor; t

Fig. 3 is a similar sectional view of a pump;

Fig. 4 is a detail view of a sealing strip;

Fig. 5 is a detail view of a vane with sealing strip;

Fig. 6 is a detail view of gears for operating the vanes;

Fig. 7 is a front view of the vane operating mechanism;

Fig. 8 is a side view of the same;

Fig. 9 is an elevational view of an assembly of the engine with acomressor, combuster and starter. I

My rotary combustion engine comprises a tubular housing I havingeccentric recesses 2, 3, 4 inside, forming expansion or compressionchambers in connection with exhaust openings or ports 5, 8, I and intakeopenings or ports 8, 9. ill. The eccentric recesses are placedsymmetrically around the concentric shaft, or their angular distancesfrom each other along the periphery are equal. Such an arrangementprovides a symmetrical distribution of the high temperature zones in thehousing, during operation of the ensine. Each hot zone, extendingaxially in the housing. produces a thermal expansion. tending to bendthe housing into an arc. I However, since these forces are distributedsymmetrically, they are balanced, eliminating any tendency to cause suchuneven bending effect. The chambers are closed at the ends by metalflanges with insulation rings I! which are clamped to the ends of thehousing I by end bells or brackets i5, i6

- which are attached to the ends of the housing as by studs II. The 1brackets are provided with antifriction bearings ll, IQ for a hollowshaft 22. The brackets have. flanges 20 for mounting on posts 2| on afoundation on a base 23 (Fig. 9).

At each end of the housing there is a cam shaft 24. rotatively mountedon the main shaft 22 by means of needle bearings 25. Each cam shaft isthe machine can be operated at any- 111111; is such that connected atone planetary transmission comprising a sun pinion 50 secured on the endof the cam tellites II on stationary shafts 82- supported in the endcover II, and an internal gear 63 mount! ed on the end of the main shaft22. The ratio of the gears is made (n-Dzl when n is the number ofcombustion chambers used. With three combustion chambers, as shown inthe drawings, the ratio will be 2:1, for rotating the eccentric shaft ata speed three times the speed of the main shaft, for operating the vanesas will be explained hereinafter. The middle portion of the main shaftis threaded at the ends for nuts 30, 8| with tapering clamping rings 32,II. The latter engage recesses 34 at the ends of a tubular rotor 35.Insulation tubes ll, 21 are placed between the rotor and the shaft, andinsulation washers 38 are placed between the recesses 34 and theclamping rings 22, ll. The rotor ends are also covered by insulatingslotted discs I28. The operating chamber with its control mechanism andthe main shaft are thereby thermally insulated from the rotor.

The rotor is slots 55 extending longitudinally from one end of the rotorto the other. vanes II are slidably fitted in the slots 55 and areprovided with extensions Si, 62 at the ends of the rotor. These-extensions are engaged by elongated slots or. holes 64 in the ends ofconnecting links I. (only one pair of vanes and links are shown in Fig.1). Insulation spacers 40 may be provided in the links for preventing orretarding flow of the heat from the vanes to the links. The vanes arearranged in pairs, one vane in each pair being placed diametricallyopposite the other, and each link thus connecting together the oppositevanes of one pail.

Each link 86 consists of two plates connected at the ends by pins orrivets ll, with spacers 43 at one end. At the other end of link it thepin 4| with a self-lubricating bearing -also engages a correspondinghole in the end of a connecting rod 45. The rod ll is provided with aclearance hole 48 for the extension ii or 82 of the vane and isrotatively mounted on an eccentric 61. The eccentric or cam is splinedat 88 (Fig. '7) to the cam shaft 24. The length of the connecting thedistance. between the outer edges of the vanes is slightly less than thedistance between diametrically opposite points of the innersurface ofthe housing. The curvature of the housing at the eccentric recesses isso selected that the distance between the diametrically opposite pointsis the same all around, and the clearance between the edges of the vanesand the housing is substantially uniform. The successive eccentrics areprogressively angularly set back in accordance with the angulardistances 7 between the successive vanes. The retarding angle betweeneccentrics equals the angle between adjacent vanes multiplied by 12-1where n is the number of chambers. The vanes are thereby positivelydriven and at no time touch the inner surface of the housing.

For sealing the clearances between the outer end to the main shaft" by ashaft 24, sat

provided with a plurality of radial ,largej ;;enough to cause anyappreciable friction and 'undue wear. Two or more strips are placed sideby side to insure a perfect seal. The individual strips are shorter thanthe distance between the ends of the rotor and the points of Junction ofthe strips are staggered to prevent leakage of gases past the strips.The strips are provided at the ends with inward extensions ll engagingthe inner sides of the end flange II. The inner edges 02 of theextensions )3 are tapered or cam-shaped as shown in Fig. 5, and Fig. 4,and are engaged by the ends of the spreader bars 84 sliding between theplates I under the strips 80. The spreader bars are urged outwards bythe centrifugal force and hear at the ends on the tapered edges 02thereby pushing the strips 80 outward into engagement with the flanges Ii. The strips therefore provide an effective seal for th. vanes not onlyalong the outer edegs but also at the ends. Additional sealing strips.85- are provided in peripherally disposed slots in the ends of therotor 35 spanning the spaces between vanesftu near the outer edge of therotor for sealing the clearances between the ends of the rotor and therespective flanges ii. The slots containing sealing strips 85 areinclined outwards so that the centrifugal force tends to press thestrips outwardly against the flanges I I.

Each eccentric depression or recess 2, 3 and 4 acts as a cylinder of anengine, expansion and power stroke taking place from the intake port 8,9 or ill to the highest point 86 in the recesses, beyond which pointbegins exhaust, or acts as a compression chamber when the engineoperates in the opposite direction as a compressor. The eccentricconnecting rod provides positive movement of the vanes entirelyeliminating any pressure from the vanes on the walls of the housing asotherwise would have been caused by the centrifugal force. The sealingstrips 80 and bars 84 are subjected to the centrifugal force but theirweight is so smal1 that their friction is negligible as regards the wearof the cylinder as well as its efiect on the efliciency of the en-.

glue. The effect of the centrifugal force on the projection portions ofthe vanes is mutually balanced in the three recesses 2, 3 and l or astill larger multiple odd number of recesses so that it has no eflect onthe balancing of the rotor.

The bearing surfaces of the eccentrics are lu-' bricated with heatresisting oil under pressure. Oil is fed through ducts into 011 grooves88 and passes through channels 8| to the second oil groove I02 to theneedle bearings 25. The oil reaches the gears by return grooves'andpasses through ducts 93 into the main bearings l8, l8 and is exhaustedthrough ducts 94, II. The return grooves also supply oil to eccentrics61 which are splined on the cam shafts 24. The temperature of the endhousing where the eccentrics are located is. substantially lowered bythe insulation around the rotor and between the rotor and the main shaftand by the air cooling arrangement with air entering through the bore 98in' the hollow main shaft and through the radial openings 92 in theshaft and leaving through the opening 91 in the end covers of thehousing, whereby the air in the chamber is circulated by theends 6i and62 of the vanes working as blades of an air fan.

The complete assembly of a power unit is shown in Fig. 9. The rotaryengine llll receives a charge of hot-burning gases through an intakepipe Ill .from a .combuster II: which in turn receives compressed air bya pipe Hi from a ro-" 6 I tary compressor Iii, fuel being fed by apipe-i ll. Exhaust gases from the engine escape through a pipe III. Astarter I25 is provided for the engine.

In the operation of compressor-engine assembly. air delivery of thecompressor is proportional to the speed only and the torque of theengine is proportional to the pressure only. The limiting element of theoperation. within the speed range, is the maximum temperature allowed bythe metallurgy of today. Operating at this top temperature andcontrolled by fuel feed alone, a top performance of the assembly isobtained; horse power and fuel being substantially proportional tospeed, the torque remains constant.

Therefore, at any speed, reduction of the horsepower and torque can beobtained by the same fuel feed control, reducing the feed which in turnreduces the temperature and pressure. The top speed is limited only bythe mechanical strength of the machine and is measured in thousands ofR. P. M.

It should be noted that the compressor has the same general constructionas the engine shown in Figs. 1 and 2 except that the insulation is notnecessary.

My rotary engine is also adapted to be used as a pump, liquid or vacuum,as shown in Fig. 3. The housing I20 of the pump is provided with intakeports I2i near the discharge ports I22, the relative positions of theports being such that the space formed by two blades at the end of thesuction operation should be equal to the space at the beginning of theexhaust operation. The number of the blades between the intake anddischarge ports depends on the degree of vacuum or pressure desired.

My engine can also operate with steam. The

expansion ratio' in such a case is made to conform to the. availablelive steam and exhaust pressures.

- utilized or substituted in the other embodiments.

' While the invention has been described in detail with respect tocertain particular'preferred examples, it will be understood by thoseskilled in the art after understanding the invention, that variouschanges and further modifications may be made without departing from thespirit and scope of the invention, and it is intended therefore in theappended claims to cover all such changes and modifications.

What is claimed as new and desired to be secured by Letters Patent is:

l. A rotary engine comprising a tubular hous ing having an intakeopening and an exhaust opening, the inner walls of the housing beingformed with eccentric recesses so shaped that the distance betweendiametrically opposite points in the housing is the'same for its entireinner periphery; a main shaft rotatively mounted in the housing; a rotormounted on. the shaft amass? in'the rotor, the housing being so shapedthat the clearance between the inner surface thereof and the vanes ismaintained substantially uniform. I

2-. A rotary engine comprising a tubular housing having an intakeopening and an exhaust opening, the inner walls of the housing being aly less than the distance between the diametriv rotor mounted on theshaft and centric recesses so shaped that the distance betweendiametrically opposite points in the housing is the same for its entireinner periphery; an intake opening and an exhaust openingfor eacheccentric recess; a shaft rotatively mounted in the housing; a rotormounted omthe shaft and provided with a plurality of radial slots; vanesslidably fitted in the slots; links connecting diametrically oppositevaries,

the distance between the outer edgesof each pair of diametrically op-'posite vanes beingslightlyle'ssthan the distance between thediametrically opposite pointsiin the housing; a camshaft concentricto'the main shaft; means for operatively connecting. the vanes to thecam shaft for positively moving the vanes in the rotor, the housingbeingso shaped that the clearance between the inner surface cally oppositepoints in the housing; a cam shaft concentric to the main shaft; meansto rotate the cam shaft by the main shaft; means for operativelyconnecting the vanes to the cam shaft for positively moving the vanes inthe rotor, the housing being so shaped that the clearance between theinner-surface thereof and the vanes is maintained substantially uniform;and sealing members movably supported in corresponding slots-in theperipheral and in the end portions of the vanes, the sealing membersslidably engaging the inner walls of the housing and constructed to beurged outward by the centrifugal force.

3. A rotary engine according to claim 2, in

which each sealing member comprises a plurality of strips which areshorter than the slot in which they are supported, and in which thesestrips are placed side by side in overlapping relation in the slot, thestrips having inwardly projecting cam portions at their ends adjacentthe ends of the slots, and a movable member under the strips in eachslot engaging the cam portions of the strips for moving the stripsradially outwardly and also endwise under the action of centrifugalforce as the rotor turns.

4., A rotary engine comprising a tubular housing having an intakeopening and an exhaust opening," the inner walls of the housing beingformed with a plurality of eccentric recesses so shaped that thedistance between diametrically opposite points in the housing is thesame for its entire inner periphery; a main shaft rotatively mounted inthe housing; a rotor mounted on the shaft and provided with a pluralityof radial slots; vanes slidably fitted in the slots; links connectingdiametrically opposite vanes, the distance between the outer edges ofeach pair of diametrically opposite vanes being slightly less than thedistance between the posite points in the housing; a cam shaftconcentric to the main shaft; means to rotate the cam shaft by the mainshaft at a ratioto cause each cam to make one complete revolution toevery eccentric recess; means for operatively connecting the vanes tothe cam shaft for positively moving the vanes in the rotor, the housingbeing so shaped that the clearance between the inner surface thereof andthe vanes is maintained substantially uniform; sealing members engagingthe inner walls of the housing; and sealing members movably supported onthe rotor and slidably fitted in slots in the outer edges of the vanes.

5. A rotary engine comprising a tubular housing, the inner walls of thehousing being formed with a plurality of circumferentially spacedeethereof and the vanes is maintained substantially uniform; sealingmembers slidablyfittedin slots in the outer edges of the vanes andengaging the inner walls of thehousing; and sealing members slidablyfitted in slots inthe end portions of the rotor and constructed to beactuated by the centrifugal force for engagin the inner surface of theend portions of the housing.

6. A rotary engine comprising a tubular houslng having an intakeopening, the inner walls of the housing having recesses so shaped thatthe dlstance'between the diametrically opposite points inthe housing isthe same for the entire inner periphery of the housing a rotorrotatively mounted in the housing and provided with a plurality ofradial slots; vanes slidably fitted in the slots; links connecting thediametrically opposite vanes, the length of the links being such as tomaintain the distance between the outer edges of the diametricallyopposite vanes slightly less than the distance between the diametricallyopposite points in the housing; the links being mounted for arectilinear reciprocating motion and a plurality of eccentric membersoperated by the rotor and operatively connected to the links forreciprocating the links thereby positively moving the vanes in therotor, the housing being so shaped that the clearance between the vanesand the inner surface of the housing is maintained substantiallyuniform.

diametrically op cally opposite vanes slightly 7. A rotary enginecomprising a tubular housing' having an intake opening and an exhaustopening, the inner walls of the housing having recesses so shaped thatthe distance between the diametrically opposite points in the housing isthe same for the entire inner periphery of the housing; a mainshaftrotatively mounted in the housing; a rotor on-the shaft provided with aplurality of radial slots; vanes slidably fitted in the slots; linksconnecting the ends of the inner portions of the diametrically oppositevanes, the length of thelinks being such as to maintain the distancebetween the outer edges of the diametriless than the distance betweenthe diametrically opposite points in the housing; sealing membersmovably supported at the outer edges of the vanes for engaging the innersurfaces-of the housing; a cam shaft rotatively supported plurality ofeccentrics secured on the cam shaft; each eccentric being pivotallyconnected to a pair of the diametrically opposite vanes; the housingbeing so shaped relative to the path described by the eccentrics thatthe clearance between the vanes and the inner surface of the housing isrotate the cam shaft.

opening and an exhaust by the main shaft; a

tions of 8. A rotary engine comprising a tubular housing having anintake opening and an exhaust opening, the inner walls of the housingbeing formed with eccentric recesses, so shaped that the distancebetween diametrically opposite points in the housing is the same for itsentire inner periphery; hollow end brackets attached to the ends of thehousing; a main shaft rotatively supported in the end brackets; a rotormounted on the middle portion of the shaft and provided with a pluralityof longitudinally extending radial slots; vanes slidably fitted in theslots, porthe vanes extending beyond the ends of the rotor; linksconnecting the extending portions of the diametrically opposite vanes,the distance between the outer edges of the diametrically opposite vanesbeing slightly less than the distance between the diametrically oppositepoints in the housing; cam shafts rotativelymounted on the portions ofthe main shaft in the hollow brackets; connecting rods operativelyconnecting the diametrically opposite vanes; cams on the cam shafts forpositively moving the vanes in the rotor. the housing being So shapedrelative to the path described by the vanes that the clearance betweenthe vanes and the inner surface of the housing is maintainedsubstantially uniform; sealing strips slidably fitted. in the vanes forslidably engaging the inner walls of the housing; and means to rotatethe cam shafts at a speed greater than the speed of the main shaftdepending on the number of the eccentric recesses in the housing.

9. A rotary engine comprising a tubular housing having an intake openingand an exhaust opening, the inner walls of the housing being formed witheccentric recesses, so shaped that the distance between diametricallyopposite points in the housing is the same for its entire innerperiphery; hollow end brackets attached.

to the ends of the housing; a main shaft rotatively supported in the endbrackets; a rotor mounted on the middle portion of the shaft andprovided with a plurality of longitudinally extending radial slots;vanes slidably fitted in the slots, portions of the vanes extendingbeyond the ends of the rotor; links connecting the extendin portions ofthe diametrically opposite vanes, the distance between the outer edgesof the diametrically opposite vanes the distance between the points inthe housing; mounted on the portions of the main shaft in the hollowbrackets; connecting rods operatively connecting the diametricallyopposite vanes; cams on the cam shafts for positively moving the vanesin the rotor, the housing being so shaped relative to the path describedby the vanes that the clearance between the vanes and the inner surfaceof the housing is maintained substantially uniform; sealing stripsslidably fitted in the vanes for slidably engaging the inner walls ofthe housing; means to rotate the cam shafts at a speed greater than thespeed of the main shaft in the ratio (11-1) :1, when n is the number ofthe eccentric recesses in the housing and the cam shaft and the mainshaft rotate in the opposite directions; and heat insulating partitionsin the housing between the ends of the rotor and the space in thebrackets for the cam shafts and connecting links.

10. A rotary engine comprising a tubular housing having an intakeopening and an exhaust opening, the inner walls of the housing beingprovided with eccentric recesses so formed that diametrically oppositebeing slightly less than i cam shafts rotatively vided with distancebetween the diametrically opposite l0 the distance between thediametrically opposite points in the housingis the same for the entireinner periphery of the housing; hollow end brackets attached to the endportions of the housing; a main shaft rotatively supported in the endcovers; a cylindricalrotor mounted on the middle portion of the shaftand provided with longitudinally extending radial slots; vanes slidablyfitted in the slots; portions of the vanes extending beyond the ends ofthe rotor into the brackets; lihks connecting extensions of thediametrically opposite vanes; cam shafts rotatively mounted on theportions, of the main shafts in the brackets; a plurality of similareccentrics secured on the cam shafts; each eccentric being pivotallyconnected to a corresponding link, the successive eccentrics beingaxially spaced along the cam shaft and progressively, circumferentiallydisplaced around the cam shaft axis by an angle (n-i) times the anglebetween the adjacent vanes, n being equal to number of compressionchambers and arranged for positively maintaining the outer edges of thevanes spacedfrom the inner surface of the housing; sealing memberssupported at the edges of the vanes slidably engaging the inner surfacesof the housing; geared connections between the main shaft and the camshafts, the main shaft being hollow and provided with radial openingsfor admitting air for cooling the parts located in the end brackets.

11. A rotary engine comprising a tubular housing having an intakeopening and an exhaust opening, the inner walls of the housing beingproeccentric recesses so formed that the points in the housing is thesame for the entire inner periphery of the housing; hollow end bracketsattached to the end portions of the housing; a main shaft rotativelysupported in the end covers; a cylindrical rotor mounted on the middleportion of the shaft and provided with longitudinally extending radialslots; means to clamp the rotor on the shaftrvanes slidably fitted inthe slots having end portions extending beyond the ends of the rotor;links connecting the extending portions of the diametrically oppositevanes; cam shafts rotatively mounted on the portions of the main shaftbeyond the ends of the rotor; a plurality of similar eccentrics securedon the cam shaft; connecting rods rotatively mounted on the eccentrics,pivotally connected to the respective links, the successive eccentricsbeing axiallyspaced along the cam shaft and progressively,circumferentially displaced around the cam shaft axis, the housing beingso shaped relative to the path described by the eccentrics that theclearance between the inner surface thereof and the vanes is maintainedsubstantially uniform; sealing members supported at the edges of thevanes and in the end portions of the rotor slidably engaging the innersurface of the housing; gear connection between the cam shafts and themain shaft for rotating the main shaft at a rate of speed different fromthe speed of the cam shafts, the ratio of the speed of the main shaft tothe cam shafts corresponding to the number of the eccentric recesses inthe housing plus or minus one depending on the direction of rotation ofthe cam shaft relative to the main shaft; and means to insulate therotor from the main shaft and from the space in the end brackets.

12. A rotary engine comprising a tubular housing having an intakeopening and an exhaust opening. the inner walls of the housing beingproa vided with eccentric recesses so turned that the distance betweenthe 99 1 points in the housing is the same for the entire innerperiphery of the housing; hollow end brackets attached to the endportions of the housing; a main shaft rotativeiy supported in the endcovers; a cylindrical rotor mounted on the middle portion 01' the shaftand provided with longitudinally extending radial slots; means to clampthe rotor on the shai'trvanes slidably ntted in the slots having endportions extending beyond the ends of the rotor: links the extendingportions oi the diame posite vanes; cam shafts rotativel moun theportions oi the main shatt beyond the ends of the rotor; a plurality 0!similar cured on the cam shalt;- tively mounted on the eccentrics,nected'to the respective links, the centrics being and progressively,-around the cam shaft axis being so shaped relative to the path describedby the eccentrics that the clearance between the inner surface thereofand the vanes is maintained substantially uniform; sealing memberssupported at the edges of the vanes and in the end portions of the rotorslidably engaging the inner surface oi the housins; gear connectionbetween the cam shafts and the main shaft for rotating the main ing;'insulation layers between the rotor and the main shaft; and insulationpartitions in the housing at the ends 01' the rotor having slots for theextensions of the vanes.

13. In a rotary engine or the type in which a rotor provided with aplurality oi longitudinally extending radial slots having vanes slidablymounted therein rotates within a housing havlug eccentric recesses soshaped that the distance between diametrically pposite points within thehousing is uniform. each vane being connected to a diametri allyOpposite vane and being controlled in its movement so that the outeredge thereof always clears the inner wall of the housing by a small yuniform distance, the combination oi vanes whose'outer edges have slotsextending longitudinall the full plurality oi sealing strips placed eachvane, each strip being shorter than the length .0! the vane andoverlapping another etri the strips having inwardly extending camportions at their ends adjacent theends oi the vane. and a membermovably supported under the strips in each vane engaging the camportions of the s ips for moving them endwise in opposite directionsunder the action or centrifugal force as the rotor turns.

14. In a rotary engine oi the type in which a rotor provided with aplurality of longitudinally extending radial slots having vanes slidablymounted therein rotates within a houting having eccentric recesses soshaped that the distance be- The following references are of record inthe tile of this patent:

, UNITED STATES PATENTS Number 0 Name Date 222,439 Barrow Dec. 9, 1879705,835 Grove July 29, 1902 797,621 Smith Aug. 22, 1905 1,009,213Augustine Nov. 21, 1911 1,015,411 Webb Jan. 23, 1912 1,582,922 Freud May4, 1926 1,595,093 Helm, Aug. 10, 1926 1,634,289 Pannell July 5, 19272,048,825 Srnelser July 28, 1936 man-ran PA'I'EN'rs Number Country Date430,715 Great Britain June 24, 1935 v .12 tween diametrically oppositepoints within the housing is uniform. each vane being connected to allyopposite vane and being con- .and extending at an angle to the rotoraxis, 01' sealing strips slidably mounted in said circumferentiallyextending slots. said sealing strips spanning the spaces between thevanes and being movable outwardly against the housing ends unends ofdiametrically opposite vanes, the distance between the outeredges' oithe diametrically opposite vanes being slightly less than the distanceWOIDEMAR A. BABY.

REFERENCES CITED

